CCNA (second lecture)

Second Lecture

•Internetworking Basics

•Network Devices

•The OSI Reference Model

•Ethernet Cabling

•Data Encapsulation

•The Cisco Three-Layer Hierarchical Model

•MAC Addressing

•Collision & Broadcast Domains

•CSMA/CD & CSMA/CA 

•TCP/IP  Model

•IP Addressing

•Network & Broadcast Addresses

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Inter-networking Basics 

•LAN : Local Area Network

•WAN : Wide Area Network

•Digital DATA

•Domain

•Peer-Peer

•Services

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Network Devices:

•HUB

 used to connect devices with each other.

the packet goes to every port to find the destination , so it's very slow  and not used these days.

•Bridge : one input and one output port , better than a hub.

•Repeater

•Switch

•Router

•Firewall

•IDS/IPS : intrusion detection system , intrusion prevention system

•SOHO Router

•Modem

•Access Point

•Wireless Repeater

•Wireless Router

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